If you have signed-up with FilesThruTheAir™ directly, you can upgrade your account at any point. Downgrading is also possible, depending on the number of sensor devices you have connected to your account. You cannot downgrade to a FREE account. To change your account type, click on the “Upgrade” link or follow the “Change or Close my account” link from the Home page.
If this Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about changing your account.